Checks the heart rhythm and can send an electric shock to the heart to turn the rhythm back to normal.
Most genes contain instructions for assembling amino acids into proteins. The RNA molecules that carry copies of these instructions are known as (mRNA) because they serve as “messengers” from DNA to the rest of the cell.
The heart, esophagus, trachea, and bronchi are all located in a portion of the body called the mediastinum.
No, they draw energy from somewhere outside there selves and convert it for their own use. Plants use photosynthesis to get energy from the sun. carnivores eat meat to get energy. herbivores use plants to get energy.